Burner



F. L. mnnoasr.

BURNER. APPLICATION FILED MAY 25' 192i.

1,420,850, Patented June 27, 1922.

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9! ATTORNEY.

, type of burner having the FREDERICK n. unnnons'r, or DETROIT, 1VIGHIGAN,-ASS1GNOR T0 DETROIT TORCH &

MANUFACTURING ooluranr, or nnrnorr, MICHIGAN, a oonroanrronor MICI-L IGAN.

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Application filed May 25,

To all whom it may concern I. V 'Be it known that! I, FREDERICK L. LIND- HORST, a citizen of'the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Burners, of which the following is a specification.

This invention relates to burners for fire. pots and blow torches. It is the object of the invention to afford a burner arranged tov give a flame which' can be usedwhere a broad, thin flame is desired, such, for instance, as used in a blow torch for removing paint from a house. Burners for giving such a flame are not broadly new. These burners, however, have usually been heretofore made with the generating element and the nozzle in thetop plate and a deflector and flame-spreading element suspended under the generating plate. The present burner involves a number of novel features in the way of improved construction to give better results-and afford a better article for economical production. This burner maybe supported upon a torch tank bya stem which screws into; a nipple directly under the burner in place of supporting the burner at the side of the burner as is the case with the generating element in thetop plate. V

' In the drawings Fig. 1 is a side elevation of the burner attached to a-blowtorch tank.

Fig. 2 is a plan view of the burner. Fig. 3 is a vertical longitudinal section of the burner. V

Fig. 4 is a vertical cross section, of the burner.

Fig. 5 is a plan View of the lower partpf the burner. V

The burner is formed by a lower element in the form. of a majorcasting of bronze, provided with. adepending neck portion (z internally screw-threaded to screw .ontothe top of the burner stem Z). .This also screws over thefthimble portion cof thepriming trough d] This major casting is made up of a fire channel having a forwardly and upwardly. inclined bottom. .The rear of this casting is formed into a suspended bridge 6 and connects with the rearwardly-extending nipple f and 9 that acts as a valve housing and fuel nozzle. This body is spaced from BURNER.

Specification of Letters Patent. Patgnted 27 1922;

1921; Serial naeraaea.

therearof the fire channel, by the isp ace 72, whlchis covered by the shield 00 with the air ports 1 This shield may be easily removed to clean:the burner orifice simply by taking out the screw .2. Along the top of the fire channel walls recesses iare moulded to form ports, some for supplying air for combus tion and some to permit'the spread of the flame outward to heat the channel walls for fuel preheating purposes, to be presently described. Y Y Y The cast iron triangular cover plate j is clamped onto the top of the fire channel and the valve housing and nozzle body 9 by means ofv screws is andl respectively. This connects together the front and rear of the majorcastingrand aids in strengthening the bridge 6 between the front andrear ends of the major casting. Of course,it is possible to cast the cover as a part of the major caste ing but this is a somewhat expensive moulding operation, and furthermore, the cover 1s kept very much cooler and will last very much longer by reason of being made a separate piece for itis desirable to make the major casting of bronze for easy machining and tosec-ure a better heat-conducting material to aid .in generating the combustible gas. The cover, if made of bronze, would not stand up very long due'to the excessive heat. Hence by making it a separate piece a better material for this purpose, to-wit,

. cast iron, may be used. The division line between the cover and the major casting forms sufficient resistance for heat conduction to very materiallykeep down the heat. Fuel oi.l.(ordinarily gasoline) is forced up through the stem Z) by air pressure supp-lied bythe pump m. A vein it runs from the top of the burner stem back through the bridge 6. The major casting is provided with a rib 0 internally projecting in the channel so as to increase the exposure of the vein. to the heat of the combustion cham ber. This very materially aids in preheating the fuel oil. .The fuel oil then passes through the vertical passage-way 9 to the valve passage 1" and into the nozzle passageway 8 that is controlled by the needle valve 6. The purpose of the rib u is to provide material through which a vein may be drilled in case the burner is used in connection with fire-pots. This, therefore, makes this form of burner very much superior for both fire pots and torches, for as already explained, the burner may set directly on top of the stem when used as a torch burner.

7 Back of the fire channel are drilled a pair of drain holes 2 which allow the fuel oil to drip down into the priming trough (Z for starting. The fin w moulded on the back of the major casting prevents the oil from dripping back on the casting and dropping off beyond the priming trough.

The cover is provided with downwardlyprojecting ribs 3 which serve to locate the cover in proper registering position on the fire channel.

The fire channel with its upwardly, forwardly inclined bottom serves to converge the flame to a narrow, thin flame and at the same time, by reason of the shape, to spread the flame. The placing of a feeding vein on this inclined bottom brings it directly in the path of the mixture undergoing conibustion to supply an adequate amount of heat to it to keep the burner from going out in a cold wind. The bane of burners of this type is their going out when being used in exposed places due largely to cold blasts of air striking the fuel before it issuesfrom the nozzle. By placing the vein in the position indicated not only is a minimum of drilling required but the vein is in the very center of the burner and directly in the path of the mixture undergoing combustion.

What I claim is:

1. In a burner for the purpose specified, the combination of a lower element in the form of a casting including a body forming a valve housing, an oil nozzle, a nipple for receiving the valve stem, and a fanlike fire channel with an upwardly-inclined floor; and an upper element in the form of a superposed cover removable for the channel, the said casting provided with a feeding vein and passageways leading to the nozzle.

2. In a burner of the type specified, the combination of a lower element in the form of a casting forming forwardly a fire channel of gradually lessening vertical cross section from back to front and forming at the rear a valve housing, nozzle body, and a nipple for the valve stem; and a superposed removable cover for the fire channel, said casting provided with a feeding vein and passage-ways leading to the discharge orifices of the nozzle.

3. In a burner of the type specified, the combination of a casting formed into a forward upwardly-opening shallow fire channel of progressively narrower vertical cross section from back to front, a rearward body forming a valve housing and a nozzle and connected with the fire channel by a sus pended bridge, and a rearwardly-extending nipple for the valve stem. and a cover secured over the fire channel.

4. In a burner of the type specified, the combination of a casting formed into a forward fire channel, a rearwardly-located body forming a valve housing and nozzle, and a rearwardly-extending nipple for the valve stem, said body being connected with the forward channel by a suspended bridge forming a space forward of the nozzle; a ported shield covering said space; and a cover over the fire channel and also over the body and reinforcing the said suspended bridge.

5. In a burner of the type specified, the combination of a casting forming a forward fire channel havin an upwardly and forwardly-extending fioor provided with a longitudinally-directed and medianly-located rib, said casting forming at the rear a valve housing and nozzle body provided with a rearwardly-extending nipple for the valve stem, and said casting furthermore providedwith a feeding vein through the said longitudinally-directed and medianlylocated rib, and passage-ways connecting the feeding vein and the discharge orifices of the nozzle, the said channel and body of the casting being connected by a suspended bridge through which runs also the rib and vein and forming above the bridge a space between the body and the side walls of the channel forward of the nozzle; a ported removable shield covering said space; and a cover supported over said fire channel.

6. In a burner of the type specified, the combination of a major casting provided with a forwardly-located fire channel having an upwardly-inclined fioor and a rearwardlydocated body forming the valve housing and nozzle connected with the forwardly-located channel by a suspended bridge,

said casting having a feeding vein running through the suspendedbridge and floor of the channel and a passage-way connecting the feeding vein with the discharge orifice in the nozzle; and a removable cover and securing devices for securing the cover removably both to the channel and the rearwardly-loc-ated body, said body and the side walls of the fire channel being spaced forward of the nozzle.

7. In a burner f the character specified, the combination of a major casting provided with a forwardly-located fire channel and a rearwardly-located valve housing and nozzle body connected with the channel by a suspended bridge, said major casting provided with a feeding vein, and passage-ways connected with the orifice in the discharge nozzle, and a removable cast iron cover clamped to both the fire channel and the top of the valve housing and nozzle body, the said side walls of the channel being spaced forward from the valve housing body at the nozzle discharge orifice.

8. In a burner of the character specified,

the combination of a lower element in the ing the walls of the notches, the said casting form of a casting formed at its forward being provided with a feeding vein, a pasend with a fire channel having side walls sage-way and a suitable valve housing and 10 with notches or recesses moulded into their nozzle connected with the passage-way.

5 upper edges as ports, and a removable cover In testimony whereof I affix my signature.

clamped to the top of the said channel and over the said notches and thereby complet- FREDERICK L. LINDHORST. 

